<template>
	<div class="todo-header">
		<input @keyup.enter="handleAdd" type="text" placeholder="请输入你的任务名称，按回车键确认"/>
	</div>
</template>

<script>
	import {nanoid} from 'nanoid'
	export default {
		name:'Header',
		props:['addTodo'],
		methods: {
			//添加的回调
			handleAdd(e){
				//校验数据
				if(!e.target.value.trim()) return alert('数据不能为空！')
				//创建一个todo对象
				const todoObj = {id:nanoid(),title:e.target.value,done:false}
				//通知App添加一个todo
				this.addTodo(todoObj) //此处调用的addTodo，其实是App那边的addTodo
				//清空用户的输入
				e.target.value = ''
			}
		},
	}
</script>

<style scoped>
	/*header*/
	.todo-header input {
		width: 560px;
		height: 28px;
		font-size: 14px;
		border: 1px solid #ccc;
		border-radius: 4px;
		padding: 4px 7px;
	}

	.todo-header input:focus {
		outline: none;
		border-color: rgba(82, 168, 236, 0.8);
		box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075), 0 0 8px rgba(82, 168, 236, 0.6);
	}
</style>